Hydraulic lifting jack



Sept. 10, 1929. c, VICKERS 1,728,088

ammuuc LIFTING JACK Filed Oct. 12. 1927 3 Sheets-Sheet 1 C. B. VICKERS nymxwuc LIFTING JACK Filed oot. 12. 1927 Sept. 10, 1929.

5 Sheets-Sheet 2 arroiifi lit/(e227 Sept; 10, 1929. c, v c s 1,728,088

HYDRAULIC LIFTING JACK Filed 0012. 12, 1927 3 Sheets-Sheet 3 Patented Sept. 10, 1929.

UNITED STATES cannon. n. vroxnns, or SEATTLE, wasnme'ron.

mnaaumc Lm'rme .mcx.

Application filed. October 12, 1927. Serial 10. 885,600.

This invention relates to improvements in lifting jacks of hydraulic type, and one of the objects of the same is to provide an improved jack so constructed and arranged as to eliminate or obviate the necessity for the use of supporting frames or platforms.

Heretofore in ]acks of this character, and when supporting frames or platforms have been employed, considerable difliculty and inconvenience has been experienced in that the supporting frames or platforms become deflected under the stress of the load, there by causing the working parts to be moved out of alinement and the frame or platform to become loose and unstable.

Furthermore by the use of such supporting frames or platforms considerable weight is added to the device and the parts cannot be compactly arranged, thereby necessitating considerable space for the operation as well as storage of the jack.

A further object is to provide an improved jack of this character in which all of the operating parts are completely housed within and protected by the body portion of the device.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention, and m which Figure 1 is a perspective view of a device of this character constructed in accordance with the principles of this invention.

Figure 2 is a detail perspective view of the upper portion of the operating handle.

Figure 3 is a top plan view of the device with parts removed, partsomitted and partly insection.

Figure 4 is a vertical, longitudinal sectional view of the device.

Figure 5 is a detail sectional view taken on line 5-5,' Figure 6.

, Figure 6 is a sectional view taken on line 50v 66, Figure 5, and with parts omitted,

Figure 7 is an enlarged detail sectional view taken on line 7-7, Fi re 3.

The body portion of the ack consists of an elongated tubular body section 10 provided with a flange 11 at one end thereof and secured to the body section adjacent the forward end thereof in any suitable manner is a caster wheel 12 mounted upon a swivel 13.

Projectin below the lower face of the body 10 an adjacent the flange 11 is a rib 14 which serves as a reinforcing rib and also as a means for preventing the flange 11 from catching into any projection over which the jack may be moved.

The body also consists of an end section 15 having connected directly thereto and at one end thereof rollers 16 of any desired and suitable type, and one face 17 of the end section is inclined to the vertical and against which face 17 the end of the tubular body portion 10 and the flange 11 abut.

The body and end sections .10 and 15 arev separably secured together in any suitable manner preferably by means of bolts or 76 screws 18 so that the parts may be readily separated when desired and also for the purpose of facilitating in the manufacture and assembling of the parts.

By the provision of the inclined face 17 the tubular body portion 10 will incline upwardly from the end section 15 to the opposite end of the body portion 10, thereby allowing the body section to be disposed in close proximity to the floor or ground and i? at the same time not interfere with the transporting or propelling of thedevice.

The end section 15 is provided with a chamber 19 in which chamber is arran ed telescoping lifting elements 2021 an a I gasket 22 is provided to form a fluid tight oint between the section 20 and the wall of the chamber 19.

This gasket 22 is preferably arranged between co-operating bushings 2324.

The section 20 is preferably of an external diameter slightly less than the internal diameter of the chamber 19, and secured to the lower end of the section 20 is a collar 25 which projects beyond the periphery of the.

section 20 to co-operate with an overhanging portion 26 of the bushing 24 and thereby hmit the outward movement of the section 20.

Carried by the section 21 is a gasket 21 held in place by means of a suitable bushing 28 to form a fluid tight joint between the sections 20 and 21. The external diameter of the section 21 is preferably slightly lem than the internal diameter of the section 20 to form an annular flange or shoulder 29 on the section 20 which co-operates with the overhanging portion or shoulder 30 at the upper end of the section 20 to limit the outward movement of the section 21 with respect to the section 20.

The der portion 31 adapted to engage a portlon of the collar 25 so as to return the section 20 when the section 21 is returned.

A s ring 32 is arranged within the sectlon 21 an is anchored by one extremity as at 33 to thebottomof the chamber 19 and is secured by its otherextremity as at 34 to the Section 21.

The spring 32 tends normally to return the section 21 and to cause the sections 21-20 to be telescoped into the chamber 19.

Extending through the face 17 of the end member 15 are openings 35-36 which are preferably 'arranged in proximity to each other and have communication with the mterior of the chamber 19 by means of the port or pasasge 37.

Removably secured in the opening 36 is a release valve embodying a casing 38 preferably secured in position by being threaded into the opening and in which casing is arranged a ball valve 39. The casing projects for a considerable distance beyond the face 17 and is provided with an opening 40 which communicates with the valve chamber and also a transverse opening 41 which extends through the walls of the casing 38 and has communication with the opening-or passage 40. for a purpose to be hereinafter set forth.

Secured in the opening 35 preferably by being threaded thereinto is a pump cylinder 42 having secured in the end thereof a valve casing 43 provided with a ball valve 44.

The cylinder 42 projects for a considerable distance beyond the face 17.

The tubular body portion 10 is provided with an opening 45 preferably extending through the top thereof and preferably dis posed adjacent the forward end of the body portion 10. Journaled in suitable bearings 46 in the body portion 10 and extending across the opening 45 is a rocker shaft 47, having secured to it a crank arm 48 which extends into the body portion 10.

Connected with the crank 48 by means of a link 49 is a piston rod 50 which moves through a suitable guide 51 and which carries at its free end a piston 52 having a bushing 28 is provided with a shoulpassage 53 therein controlled by a ball valve 54. transverse passage 55 is also provided in the piston rod 50 which communicates with the passage 53 so that liquid may flow from the c linder 42through the openings 5553 an through the opening 43 into the passage 37 when the piston 1s moved in one direction, but when the piston is moved in the opposite direction the ball valve 54 will be seated to close a portion of the passage 53 and also close the passage 55.

The piston 52 telescopes into the cylinder 42 and carried by the piston rod 50 is a collar 56 against which a spring 57 that encompasses the piston rod 50, rests at one end and the other end of the spring engages a collar or seat 58 loosely mounted upon the piston rod 50, and which seat or collar. 58 is adapted to engage the end of the cylinder 42 so that when the piston rod 50 is moved in one direction energy will be stored in the spring 57 which will tend to assist in moving the piston rod 50 in the opposite direction.

Connected with the rocker shaft 47 and disposed on the outside of the body portion 10 is a handle 59 for rocking the shaft, and this handle may be of any desired size and configuration and serves also as a means whereby the device may be propelled.

Mounted also in suitable bearings preferably adjacent the rocker shaft 47 and extending across the opening 45 is another shaft 60 which has connected to it a crank arm 61 and to this crank arm is connected a release valve operating rod 62. The free end of the rod 62 telescopes into the extended portion of the valve casing 38 and is adapted to engage the ball valve 39 to move the same from its seat and thereby open the passages 40 and 41 to establish communication between the interior of the body portion 10 and the passage 37 which leads to and from the chamber 19 so that when the valve 39 is unseated, pressure upon the liquid in the chamber 19 by the telescoping movements of the elements 20 and 21, will force the liquid from the chamber 19 through the passage 37, through the passage 40. in the valve casing 38 and passage 41, back into the body portion 10. This is accomplished by reason of the fact that the pressure upon the liquid in the chamber 19 will be relieved.

The release valve operating rod 62 maybe operated in any suitable manner, but a simple and etficient means will now be described.

Pivotally mounted upon any suitable portion of the structure, preferably upon a portion of the body 10 and intermediate its ends as at 63, is a trip member 64 and connected with the rocker shaft 60 is an arm 65 having an adjustable element 66 connected therewith. This element 66 contacts with the element 64 so that when the latter is rocked the arm 65 will be rocked and with it the rocker shaft 60.

The element 64 is controlled preferably by means of a bar or rod 67 mounted upon the handle 59 and slides through suitable guides 6869. .An eccentric is connected with the end of the rod 67 and a handle 71 located in a convenient position for the operator is connected with the eccentric 70 for rotating it and thereby actuating the rod 67.

When the rod 67 is moved in one direction to lower it the end 71 will contact with the element 64 to rock it in one direction about its pivot 63, and thereby unseat the valve 39.

The rod 67 and member 64 may be returned to their normal positions as well as the release valve rod 62, in any suitable manner, but preferably are returned by the pressure upon the fluid in the chamber 19 acting upon the valve 39. This pressure will force the valve 39 to its seat in the valve casing 38 and into engagement with the extremity of the rod 62 to mbve it in a direction to permit the valve 39 to be seated.

It is thought that the operation of the device will be clearly understood from the foregoing description but briefly stated it is as follows. Assuming the members 20 and 21 to be telescoped within the chamber 19, as shown in Figure 7, the handle 59 is then rocked after the jack has been placed in' position to rock the shaft 47 and this will reciprocate the piston 52 in the cylinder 42.

When the piston rod is withdrawn from the cylinder, liquid will enter the cylinder 42 and will flow into the passage 55, thence into the passage 53 to unseat the ball. valve 54 and thence through the other portion of the passage 53 to the other, side of the piston 52, the valve 54 and passage-53 being of a size and construction to permit the liquid to flow through the piston 52 on' this motion of the piston.

Liquid will then occupy the space between the piston 52 and the valve 44, which latter is held seated by suction when the piston 52 is withdrawn.

When the piston 52 is then forced forwardly to expel the liquid from the cylinder 52 the valve 54 will close the passage 55 and will unseat the valve 44 so that the liquid will be forced through the valve casing 43 into the passage 37 and beneath the telescoping lifting elements 20 and 21.

By reciprocating the handle 59 this operation will be repeated until the lifting elements have assumed the desired relative height.

The load will then be held elevated by the lifting elements 20 and 21 as the valve 44 will be, closed by pressure upon the liquid in the cylinder 19 and the valve 39 will also be closed by such pressure.

When it is desired to lower the load and to allow the sections 20 and 21 to telescope into the chamber 19 the handle 71, which is connected with the release valve actuating rod, is actuated to force the end of the rod augmented by the stress or energy in the c,

spring 32 will cause the sections 2021 to telescope and the liquid will then be forced out of the chamber 19 through the passage 37,-through the passages 40-41 back into the body portion 10.

It will be noted that with this improved construction the end section 15 supports the cylinder 42 and the release valve casing 38, both of which project beyond the face 17 of the end section.

The piston rod 50 and piston 52 together with the reciprocating means therefor and the release valve actuating rod 62 and the actuating means therefor are all carried by and are housed within the tubular body portion 10 so that in assembling the that is necessary is to place the flange 11 of the body portion 10 against the face 17 of the end section 15' and secure the parts together by means of the fastening screws or bolts 18.

With this construction it will be manifest that all of the actuating parts are housed within the body of the structure, and as the section 10 constitutes the cylinder for holding the liquid which operates the lifting elements 20-21, all of the operating arts of the device will not only be protecte but will be submerged in the liquid.

The opening 45 is closed by means of a construction, easy to assemble, with a consequent reduction in the cost of manufacture.

.Access may be readily had to the pumping mechanism and release valve mechanism by removing the fastening screws or bolts 18 While the preferred form of the invention has been-herein shown anddescribed, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims,

without departing from the spirit of this invention.

What is claimed as new is 1. A portable hydraulic jack embodying an elongated substantially horizontal tubupiston operating mechanism housed within the tubular bodyportion, release valve operatingmechanism also housed within the tubular body portion, the proximate face of the said end section and the end of the said tubular body portion abutting, and means separably securing the body and end section together to facilltate assembling of the parts i are secured together, the said pump pump cylinder within the tu a valve cylmder projecting into the said tubular ody portion. e 2. A portable hydraulic 'ack embodying an elongated substantially orizontal tubular bod portion and an end section forming a ameless structure and constituting the main supporting body structure, sa' end section embodying lifting elements, and a release valve, piston and piston operating mechanism housed ular body" portion, release valve operating mechanism also housed within the tubular body portion, the roximate face of the said end section and t e end of the said tubular body portion abutting, means separably securin the, body and end section toglether to facilitate assembling of the parts efore the body and end sections are, secured together, the said pump cgolinder projecting into the said tubular dy portion, means exterior of the tubular body portion and individual to the said piston operating mechanism and the said release valve operating mechanism for actuating them. g v

3. A portable hydraulic jack embodying an elongated substantially horizontal tubular body portion and an end section, said end section embodying lifting elements, pump cylinder and a release valve, piston and piston operating mechanism housed within the tubular body portion, release 0 eratin mechanism also housed within t e tubu ar body portion, the proximate face of the said end section and the end of the said tubular body portion abutting, and means separably securing the bod and end section together, the said pump cy inder projecting into the said tubular body pggtion, one of the abutting faces of the said y and end section being inclined where-' by the said body section will have an upend of the ting the said wall of the said end section and efore the body and end sections p ward inclination from the said end section with respect to the horizontal.

'4. A portable hydraulic jack embodying a tubular body section, an end section, said end section embodying an upright cylinder and lifting members co-operating therewith, a pump cylinder detachably connected with and projecting beyond the wall of the said end member and communicating with the first said cylinder, a release valve also de' tachably connected with the wall of said end member and projecting therefrom in proximity to the said pump cylinder, one

said tubular body section abutinto which tubular body the said pump cylinder and release valve proje t, means detachably securing the body section and end member together, and means individual to and housed within the said tubular body for actuating the said release valve and ump.

5. A portable hydraulic jack embodying a tubular body section, an end section, said end sectionembodying an uprightcylinder and lifting members co-operating therewith, a pump cylinder detachably connected with and projecting beyond the wall of the said end member and communicating with the first said cylinder, a release valvealso detachably connected with the wall of said end member and projecting therefrom in proximity to the said pump cylinder, one

end of the said tubular body section abutting the said wall of the said end section and into which tubular body the said pump cylinder and release valve project, means detachably securing the be y section and end member together, means individual to and housed within the said subular body for actuating the said release valve and pump, and

means individual to said release valve and said pump actuating mechanism and exte= rior of said tubular body section for, actuating them..

6. A portable hydraulic jack embodying an elongated substantially horizontal body forming a frameless structure and constituting the mainsupporting' body structure, traction means disposed only adjacent the extreme ends ofsaid structure, lifting ele-' ments carried by said structure adjacent one end thereof, means entirely housed within the body of the structure for controlling the operation of the said lifting elements, and means exterior of the body and disposed adjacent the other end thereof for controlling the said enclosed controlling means.

7. A portable hydraulic ack embodgng an elongated substantially orizontal dy forming a frameless structure and constituting the main supporting body structure, a ground engaging element secured directly to said body at one end thereof, an end section, a ground engaging element secured diend section-together, the said pump cylinder rectly to said section adjacent one end there- 'of, lifting elements carried by said end section, and operating and controlling mechanism carried by and housed within the said body section.

8. A portable hydraulic jack embodying housed within the said body section, and

means exterior of said body section and adjacent the end thereof which is remote of the said lifting elements and individual to the said operating and release for actuating them.

9. A portable hydraulic jack embodying an elongated substantially horizontal tubular body portion and an end section, said end section embodying lifting elements, pump cylinder and a release'valve, piston and piston operating mechanism housed within the tubular body portion, release valve operating mechanism also housed within the tubular body portion, the proximate face of the said'end section and the end of the said tubular body portion abutting, means sepa'rably securing the body and projecting into the said tubular body porpivotally connected to the body section ad acent one end thereof and exterior of said section for actuating the pumping mechanism, an eccentric connected with said handle, and an operative connection between said eccentric and the said release valve operating mechanism for controlling it.

, 10. A an elongated substantially'horizontal tubular body portion, a lifting element carried by one end thereof, an opening through the wall of said body adjacent the other end thereof, a removable closure for said opening, actuating and control mechanism for the said lifting element housed within said a rocker shaft journaled in.

tubular body, said body and extending transversely across sald opening,

means individual to said ac-' tuating and controlling mechanism andhoused within the said body for controllin them, and an actuating handle connected to said rocker shaft and exterior of said body for rocking the shaft and for transporting said jack. A

In' testimony whereofI have signed my name to this s ecification on this 29th day of September, D. 1927.

CARROLLIB." vIoKEns controlling means portable hydraulic jack embodying 

